Speed control apparatus



ENERGIZING POWER Jan. 17, 1967- Filed Nov. 6, 1964 F. A. RAYMOND ETAL SPEED CONTROL APPARATUS 2 Sheets-Sheet l FQANClS A. RAYMOND DONALD E. BoNAssaA ATTYS.

111.17, 1967 RAYMOND ETAL 3,298,622

SPEED CONTROL APPARATUS Filed Nov. 6, 1964 2 Sheets$heet 2 P l OUTPUT 1 I l 1 I l I f i i i 24 OUTPUT I l 1 FFZ' oi T2 J OUTPUT i 76 FF! I l i 25 i 26 OUTPUT LINEAR. \IEOC RUNNING WEB PERIPHERAL SPEED -r MAXIMUM OVERSPEED SPEED MAXIMUM UNDERSPEED INVENTORS PREDRIVE 'N'TIATED Fmmcls A. RAYMOND DONALD E, BONASERA United States Patent @fiiee 3,298,622 Patented Jan. 17, 1967 3,298,622 SPEED CQN'IRUL APPARATUS Francis A. Raymond, Westrnont, and Donald E. Bonasera,

Bellwood, lll., assignors to Miehle-Goss-Dexter, Incorporated, Chicago, Ill., a corporation of Delaware Filed Nov. 6, 1964, Ser. No. 409,450 Claims. (Cl. 2 .2-58.1)

The present invention relates in general to speed control apparatus and, more specifically, to apparatus for substantially matching the speed of a first member to the speed of a second member. While not so limited in its uses, the present invention finds particular, advantageous use in connection with splicing apparatus for paper presses or the like wherein the peripheral speed of a new roll of web or paper is to be substantially matched to the linear velocity of the running web or paper from an expiring roll so that the web on the new roll may be spliced to the running web without being severed.

In a printing press of the type having a plurality of paper rolls on a reel, the paper normally is fed into the press from one roll until the roll diameter approaches the diameter of the core around which the paper is wrapped. Paper from a second roll on the reel is then spliced to the paper from the expiring roll while the press is operating to maintain a continuous paper feed to the press. In order for the paper from the second roll to be spliced to the paper from the expiring roll without being severed, the new roll of paper must be predriven or rotated so that its peripheral speed substantially matches the linear velocity of the paper being fed to the press from the expiring roll.

A principal object of the present invention is to provide new and improved apparatus for substantially matching the speed of a first member with the speed of a second member. More specifically, an object is to provide new and improved apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll. A related object is to provide such apparatus for predriving the new roll of web so that the web on the new roll may be spliced to the running web Without the web on the new roll being severed.

A general object of the invention is to provide new and improved apparatus for substantially matching the speed of a first member with the speed of a second member characterized in that the apparatus does not require periodic adjustments. Another object is to provide such apparatus which operates completely independently of external loading. Still another object is to provide such apparatus which does away with the need of continual maintenanoe.

A further object is to provide new and improved apparatus for substantially matching the speed of a first member with the speed of a second member characterized in its simplicity, economy, reliability and stability.

Other objects and advantages of the invention will become apparent as the description proceeds, taken in conjunction With the accompanying drawings, in which:

FIGURE 1 is a block diagram of apparatus constructed in accordance with the present invention for substantially matching the speed of a first member with the speed of a second member;

FIG. 2 is a diagram which illustrates the relationship between pulses produced by the apparatus of FIG. 1 when the speed of the first member is substantially les than the speed of the second member;

FIG. 3 is a diagram which illustrates the relationship between pulses produced by the apparatus of FIG. 1 when the speed of the first member is slightly greater than the speed of the second member;

FIG. 4 is a diagram Which illustrates the relationship between pulses produced by the apparatus of FIG. 1 when the speed of the first member is slightly less than the speed of the second member; and

FIG. 5 is a graph illustrating the relationship between the speeds of the first member and the second member during a typical operation when the speeds are controlled by the apparatus of FIG. 1.

While the invention has been described in connection with a certain preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment but, on the contrary, the invention is intended to cover the various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

For the purpose of this description, it will be assumed that the speed control apparatus is used in connection with splicing apparatus for a paper press or the like wherein the paper or web on a new roll is to be spliced to the running paper or web from an expiring roll. However, it is to be understood that this is merely illustrative of one application for the invention disclosed and claimed herein.

In FIG. 1, flip-flops have been symbolically illustrated since they are commonly used in the electronics art. However, a brief description of the operation may be helpful in understanding the operation of the present invention. The flip-flops are illustrated as rectangles having two sections, one being marked S and the other being marked R. Input terminals are attached to the left-hand sides of the flip-flops, as illustrated, and the output terminals are attached to the right-hand sides thereof. Some of the flip-flops are of the monostable type, these flip-flops being designated with the letters MS, whereas the remaining flipfiops are of the bistable type. When an input signal or pulse is applied to the S input of a monostable flipfiop, the flip-flop is set and a prescribed time period thereafter the flip-lop automatically resets itself. During this period of operation, a desired ouput pulse is produced at the S output terminal of the monostable fiipflop having a time period corresponding to the time period required for the flip-flop to reset itself subsequent to being set. When an input or signal or pulse is applied to the S input of a bistable flip-flop, the flip-flop is set and a desired output signal is provided at the S output terminal only. Subsequently, when an input signal or pulse is applied to the R input terminal, the flip-flop is reset and a desired output signal is provided at the R output terminal only.

Additionally, in FIG. 1, AND gates have been symbolically illustrated. Since such gates are common in the art, a description thereof will not be set forth. Suffice it to say that, when input pulses or signals are simultaneously received at the input terminals of an AND gate, a desired output signal or pulse is produced at the output terminal thereof.

In accordance with the present invention, new and improved apparatus has been provided for substantially matching the speed of a first member with the speed of a second member. More specifically, means have been provided for producing pulses at a rate dependent upon the speed of the first member, means have been provided for producing pulses at a rate dependent upon the speed of the second member and means have been provided for responding to portions of two consecutive second member pulses occurring between two consecutive first member pulses for causing the speed of the first member to be increased and for responding to portions of two consecutive first member pulses occurring between two consecutive second member pulses for causing the speed of the first member to be decreased. Referring to FIG. 1, such apparatus is disclosed in block form. This apparatus will now be described as used in connection with splicing apparatus for a paper press or the like wherein the peripheral speed of a new roll of web material is substantially matched with the linear velocity of the running web being drawn from an expiring roll so that the web of material on the new roll may be spliced to the running web from the expiring roll without being severed.

For the purpose of producing timing pulses at a rate dependent upon the linear velocity of the running web being drawn from an expiring roll (not shown), a magnetic pickup device 11 is associated with a gear 12 mounted on the shaft of an impression cylinder (not shown) so that pulses are produced when paper is being printed. It is to be understood that this is merely one means for producing such timing pulses and any desired means may be utilized for producing such pulses which falls within the scope of the invention. The magnetic pickup device 11 and the gear 12 are so associated that, as the gear rotates, the teeth thereof induce pulses in the magnetic pickup device which produces an A.-C. output, one A.-C. output cycle being provided for each pulse induced therein. The A.-C. output of the magnetic pickup device 11 is transmitted to a level converter LCl which, in turn, causes a desired input signal to be transmitted to the S input of a monostable flip-flop FFI. In response thereto, the monostable flip-flop FFI is driven to the set condition and a predetermined time period thereafter the monostable flip-flop FFl automatically resets itself. During this period of operation, an output pulse is produced at the S output of the monostable flip-flop FFl which has a time period corresponding to the time period required for the monostable flip-flop to be reset subsequent to being set. One output pulse is produced for each cycle of the A.-C. output produced by the magnetic pickup device 11 and, thus, for each tooth of the gear 12 which passes the magnetic pickup device. Since the rate at which the teeth of the gear 12 pass the pickup device 11 is dependent upon the linear velocity of the web drawn from the expiring roll, it will be readily apparent that output pulses are produced at the S output of the flip-flop FF1 at a rate dependent upon the linear velocity of the running web drawn from the expiring roll.

For the purpose of producing timing pulses at a rate dependent upon the peripheral speed of a new roll of web material, a magnetic pickup device 13 is associated with a gear 14 mounted on a shaft which is coupled, via a belt or the like 14a, to the periphery of the new roll so that pulses are produced when the new roll is rotated. Again, this is merely illustrative of one means for producing such timing pulses and any desired means may be utilized which fall within the scope of the invention. The magnetic pickup device 13 and the gear 14 are also so associated that, as the gear rotates, the teeth thereof induce pulses in the magnetic pickup device which produces an A.-C. output, one A.-C. output cycle being provided for each pulse induced therein. The A.-C. output of the magnetic pickup device 13 is transmitted to a level converter LCZ which, in turn, causes a desired input signal to be transmitted to the S input of. a monostable flip-flop FF2. In response thereto, the flip-flop FFZ is driven to the set condition and a predetermined time period thereafter the flip-flop automatically resets itself. During this period of operation, an output pulse is produced at the S output of the flip-flop FFZ having a time period corresponding to the time period required for the flip-flop to reset itself subsequent to being set. In like manner, one output pulse is produced for each cycle of the A.-C. output produced by the magnetic pickup device 13 and, thus, for each tooth of the gear 14 that passes the magnetic'pickup device. Since the rate at which the teeth of the gear 14 pass the pickup device 13 is dependent upon the peripheral speed of the new roll, it will be readily apparent that output pulses are produced put signal is produced at the R output of the flip-flop FPS which is transmitted to a gate AND3 causing the 4- at the S output of the flip-flop FFZ at a rate dependent upon the peripheral speed of the new roll.

In keeping with the present invention, means are provided for responding to the output pulses produced at the S outputs of the monostable flip-flops FFl and FFZ to control the operation of a drive motor 15 which drives the new roll and, thus, to control the peripheral speed of the new roll. More specifically, means are provided for responding to at least portions of two consecutive pulses being produced by the flip-flop F1 1 during the time interval between the production of two consecutive pulses by the flip-flop FFZ to increase the speed at which the new roll is driven and for responding to at least portions of two consecutive pulses being produced by the flipfiop FFZ during the time interval between the production of two consecutive pulses by the flip-flop FF 1 to decrease the speed at which the new roll is driven. In the exemplary arrangement, a bistable flip-flop FF3 is provided for responding to output pulses or portions thereof produced at the S outputs of the flip-flops FFI and FFZ to condition the control apparatus for increasing or decreasing the rotational speed of the new roll in response to a subsequent pulse produced only at the S output of one of the flip-flops FFI and FFZ or a portion of such a pulse.

As may be seen, the S output of the monostable flipflop FFI is connected to the S input of the bistable flip-flop FFS for causing the flip-flop P1 3 to be set in response to the production of an output pulse or a portion thereof only at the S output of the flip-flop FF-l whereby a desired output signal is produced at the S output of the flip-flop FF3. The output signal produced at the S output of the flip-flop F1 3 is transmitted to a gate AND1 and the conditions the gate for the passage of a subsequent pulse so that, provided the flip-flop FF3 is maintained in the set condition, the next subsequent output pulse or portion thereof produced only at the S output of the flip-flop FFl is transmitted through the gate AND1 to the S input of a bistable flip-flop FF4. The flip-flop F1 4 is set in response thereto and a desired output signal is produced at the S output thereof which is transmitted through a gate ANDZ to an amplifier AMPl, provided an energizing switch BS1 was previously closed to allow energizing power to be transmitted from a source 16 to the gate AND2 to condition the gate for the passage of such a signal. In a printing operation wherein the web on a new roll is to be spliced to the web being drawn from an expiring roll, the switch B81 is closed as the time for effecting such splicing is approached so that energizing power is supplied to the gate AND2. In the exemplary arrangement, the drive motor 15 is also energized when the switch B81 is closed. The signal transmitted to the amplifier AMPl is amplified and is applied to a clutch 17 associated with the drive motor 15 causing the clutch to be energized so that the driving motor 15 drivingly engages the new roll to impart rotational movement thereto.

The S output of the monostable flip-flop FFZ is connected to the R input of the flip-flop FF3 so that, in response to the production of an output pulse or a portion thereof only at the S output of the flip-flop FFZ, the flip-flop FF3 is reset. In response thereto, a desired outgate to be conditioned for the passage of a pulse' so that, provided the flip-flop FPS is maintained in the reset condition, the next subsequent output pulse or portion thereof produced only at the S output of the flip-flop FFZ is transmitted through the gate ANDS to the R the signal and applies it to a brake 18 associated with the new roll causing the brake to be energized so that the speed of rotation of the new roll is decreased.

For the purpose of providing a better understanding of the speed control apparatus as thus far described, a typical operation thereof will be set forth in conjunction with the illustrations of FIGS. 2-5. Referring to FIG. 5, the running web is being drawn from the expiring roll at a specific linear velocity. Since the web on the new roll is to be spliced to the running web when the diameter of the expiring roll approaches the diameter of the core around which the web or paper is wrapped, the new roll must be predriven so that its peripheral speed substantially matches the linear velocity of the running web prior to the time at which the splicing operation is to be performed. As viewed in FIG. 5, the predriving of the roll is to be initiated at time t and such initiation is accomplished by closing the energizing switch ESL which, it will be assumed, energizes the entire circuit. As a result, at time t energizing power is supplied from the energizing source 16 to gates AND2 and AND4, whereby the gates are conditioned for the passage of signals from the flip-flop FF4. Additionally, energizing power is supplied to the drive motor so that the drive motor is energized. However, the clutch 17 is not initially energized so that the motor 15 is not in driving engagement with the new roll. Consequently, the gear 12 is being rotated, whereas the gear 14 is stationary so that output pulses are only being produced at the S output of the flip-flop FF 1. The first pulse produced at the S output of the flip-flop FF1 causes the flip-flop FF3 to be set so that the gate ANDl is conditioned for the passage of a pulse and so that the next subsequent output pulse produced at the S output of the flip-flop FF 1 is transmitted through the gate to the S input of the flip-flop FF4. In response thereto, the flip-flop F1 4 is set and a desired signal is applied to the clutch 17 causing the clutch to be energized so that the drive motor 15 drivingly engages the new roll. Thus, the peripheral speed of the new roll increases as shown in FIG. 5.

When the peripheral speed of the new roll is still substantially below the linear velocity of the running web (for example, at time t the gear 12 is rotating at a greater speed than the gear 14. Consequently, output pulses are produced at the S output of the flip-flop FFl at a greater rate than output pulses are produced at the S output of the flip-flop FF2. The relationship between the output pulses produced by the flip-flops FFl and FF2 corresponds to that shown in FIG. 2 so that two consecutive output pulses 21 and 22 are produced at the S output of the flip-flop FF1 during the time period occurring between the production of two consecutive output pulses 23 and 24 at the S output of the flip-flop FF2. The first pulse 21 causes the flip-flop FF3 to be set, whereas the second pulse passes through the gate AND1 to the S input of the flip-flop FF4 which is maintained in the set condition so that the clutch 17 is maintained energized. Thus, the drive motor 15 remains in driving engagement with the new roll so that the new roll is continually being driven at a greater speed as shown in FIG. 5. As will be readily apparent, the clutch 17 is maintained energized as long as the gear 12 is rotated at a greater speed or at the same speed as the gear 14.

When the speed at which the new roll is being driven begins to exceed the linear velocity of the running web (time t;; in FIG. 5), the gear 14 is driven at a greater speed than the gear 12. Consequently, output pulses are produced at the S output of the flip-flop FF2 at a greater rate than output pulses are produced at the S output of the flip-flop FFl. The actual relationship between the production of pulses when the speed of the new roll begins to exceed the linear velocity of the running web corresponds to that shown in FIG. 3. As may be seen, portions of the output pulses 25 and 26 produced at the S output of the flip-flop FF2 occur during the time interval between the production of output pulses 27 and 28 at the S output of the flip-flop FFl. In response to the shaded portion of the output pulse 25, the flip-flop FF3 is driven to the reset condition so that an output pulse is produced at the R output thereof which causes the gate AND3 to be conditioned for the passage of a pulse. The next output pulse 26 produced by the flip-fiop FF2 then passes through the gate AND3 to the R input of the flip-flop FF4 causing flip-flop FF4 to be reset. In response thereto, a signal is transmitted to the brake 18 causing the brake to be energized so that braking action is applied to the new roll whereby the speed of rotation thereof is decreased. At the same time, since the flip-flop FF4 has been reset, the clutch 17 is deenergized so that the drive means 15 is no longer in driving engagement with the new roll.

As the speed of the new roll decreases, a point is reached (at time t., in FIG. 5) whereat the peripheral speed of the new roll begins to drop below the linear velocity of the running web. At this time, the gear 12 will begin to rotate at a greater speed than the gear 14 so that output pulses are again produced at the S output of the flip-flop FF1 at a greater rate than output pulses are produced at the S output of the flip-flop FF2. The relationship between these output pulses corresponds to that shown in FIG. 4. Consequently, the flip-flop FF4 is again set so that the clutch 17 is again energized and the brake 18 is deenergized. As a result, the drive motor 15 again drivingly engages the new roll to again increase the speed of rotation thereof.

In view of the foregoing, it will be readily apparent that the clutch 17 and the brake 18 are alternately energized to cause the peripheral speed of the new roll to be substantially matched to the linear velocity of the running web. The web on the new roll may thereafter be spliced to the running web, for example, at time i in FIG. 5.

Additionally, it will be readily apparent that, subsequent to the peripheral speed of the new roll being brought up to a speed that substantially matches the linear velocity of the running web, the peripheral speed of the new roll fluctuates about the running web speed between a maximum overspeed and a maximum underspeed. Referring to FIGS. 2-4, a maximum overspeed occurs when T d=T +d, wherein and Therefore,

The percentage of overspeed is determined by the following equation:

Percent overspeed= 1 f substituting f =fi l 2( f Percent over speed 100 2 1 max. Maxlrnum per cent over speed-- l J 100 On the other hand, maximum underspeed occurs when T +d=T -d, wherein again and The percentage of underspeed is determined by the following equation:

Percent underspeed= l )l% Substituting f =f 2df f Percent underspeed= 100 It will be understood that the above constitutes a simplified case where the pulses being compared are totally otfset and that in the general case much closer contact will be achieved.

Speed control apparatus has thus been provided for substantially matching the speed of a first member to the speed of a second member. More specifically, such apparatus has been provided for substantially matching the peripheral speed of a new roll of web material to the linear velocity of a web being drawn from an expiring roll.

The term projections in the claims refers to physical or magnetic discontinuities.

We claim as our invention:

1. In apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll, the combination which comprises, a driving motor, a clutch interposed between the driving motor and the new roll for causing the new roll to be driven by the driving motor when energized, a brake associated with the new roll for braking the new roll when energized, means associated with the new roll for producing new roll timing pulses at a rate dependent upon the peripheral speed of the new roll, means associated with the running web for producing running web timing pulses at a rate dependent upon the linear velocity of the running web, means responsive to at least portions of two consecutive running web timing pulses occurring during the time interval between the production of two consecutive new roll timing pulses for energizing the clutch and deenergizing.

the brake, and means responsive to at least portions of two consecutive new roll timing pulses occurring during the time interval between the production of two consecutive running web timing pulses for energizing the brake and deenergizing the clutch.

2. In apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll, the combination which comprises, a driving motor, a clutch interposed between the driving motor and the new roll for causing the new roll to be driven by the driving motor when energized, a brake associated with the new roll for braking the new roll when energized, clutch control means for energizing the clutch when rendered operative, brake control means for energizing the brake when rendered operative, a gate interposed between the running web timing pulse producing means and the clutch control means, a gate interposed between the new roll timing pulse producing means and the brake control means, a flip-flop responsive to a running web timing pulse for opening the first gate and closing the second gate and responsive to a new roll timing pulse for opening the second gate and closing the first gate so that the clutch is energized and the brake deenergized when at least portions of two consecutive running web timing pulses occur during the time interval between the production of 8 two consecutive new roll timing pulses whereas the brake is energized and the clutch deenergized when at least portions of two consecutive new roll timing pulses occur during the time interval between the production of two consecutive running web timing pulses.

3. In apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll, the combination which comprises controllable driving means for the new roll, controllable braking means for the new roll, first pulse generating means operatively associated with the new roll for producing new roll timing pulses at a rate dependent upon the peripheral speed of the new roll, second pulse generating means operatively associated with the running web for producing running web timing pulses at a rate dependent upon the linear velocity of the running web, control means operatively associated with said first and second pulse generating means, said control means being responsive to a first time relationship between said new roll timing pulses and said running web timing pulses for energizing said controllable driving means and deenergizing said controllable braking means, and said control means being responsive to a second time relationship between said new roll timing pulses and said running we-b timing pulses for energizing said controllable brake means and deenergizing said controlling driving means.

4. In apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll, the combination which comprises controllable driving means for the new roll, controllable braking means for the new roll, first pulse generating means operatively associated with the new roll for producing new roll timing pulses at a rate dependent upon the peripheral speed of the new roll, second pulse generating means operatively associated with the running web for producing running web timing pulses at a rate dependent upon the linear velocity of the running web, control means operatively associated with said first and second pulse generating means, said control means being responsive to at least portions of two consecutive running web timing pulses occurring during the time interval between the production of two consecutive new roll timing pulses for energizing said controllable driving means and deenergizing said controllable braking means, said control means also being responsive to at least portions of two consecutive new roll timing pulses occurring during the time interval between the production of two consecutive running web timing pulses for energizing said controllable brake means and deenergizing said controllable driving means.

5. In apparatus for substantially matching the peripheral speed of a new roll of web material with the linear velocity of a running web being drawn from an expiring roll, the combination which comprises controllable driving means for the new roll, controllable braking means for the new roll, first pulse generating means including a cylindrical device having ,a plurality of projections formed around the circumference thereof which is associated with the new roll and is rotated at the same speed as the new roll and means including a magnetic pickup device posi tioned adjacent the cylindrical device associated with the new roll for producing a new roll timing pulse in response to the passage of each projection, second pulse generating means including a cylindrical device having a plurality of projections formed around the circumference thereof which is associated with the running web and is rotated at a speed dependent upon the rate at which the running web is being used up and means including a magnetic pickup device positioned adjacent the cylindrical device associated with the running web for producing a running web timing pulse in response to the passage of each projection, and control means operatively associated with said first and second pulse generating means, said control means being responsive to at least portions of two consecutive running Web timing pulses occurring during the time interval between the production of two consecutive new roll timing pulses for energizing said controllable driving means and deenergizing said controllable braking means, said control means also being responsive to at least portions of two consecutive new roll timing pulses occurring during the time interval between the production of two consecutive running web timing pulses for energizing said controllable brake means and deenergizing said controllable driving means.

References Cited by the Examiner UNITED STATES PATENTS Jones 318-318 X Hall 318-314 Gifift 3 18-3 14 Justus et al 242-583 FRANK J. COHEN, Primary Examiner. 10 L. D. CHRISTIAN, Examiner. 

1. IN APPARATUS FOR SUBSTANTIALLY MATCHING THE PERIPHERAL SPEED OF A NEW ROLL OF WEB MATERIAL WITH THE LINEAR VELOCITY OF A RUNNING WEB BEING DRAWN FROM AN EXPIRING ROLL, THE COMBINATION WHICH COMPRISES, A DRIVING MOTOR, A CLUTCH INTERPOSED BETWEEN THE DRIVING MOTOR AND THE NEW ROLL FOR CAUSING THE NEW ROLL TO BE DRIVEN BY THE DRIVING MOTOR WHEN ENERGIZED, A BRAKE ASSOCIATED WITH THE NEW ROLL FOR BRAKING THE NEW ROLL WHEN ENERGIZED, MEANS ASSOCIATED WITH THE NEW ROLL FOR PRODUCING NEW ROLL TIMING PULSES AT A RATE DEPENDENT UPON THE PERIPHERAL SPEED OF THE NEW ROLL, MEANS ASSOCIATED WITH THE RUNNING WEB FOR PRODUCING RUNNING WEB TIMING PULSES AT A RATE DEPENDENT UPON THE LINEAR VELOCITY OF THE RUNNING WEB, MEANS RESPONSIVE TO AT LEAST PORTIONS OF TWO CONSECUTIVE RUNNING WEB TIMING PULSES OCCURRING DURING THE TIME INTERVAL BETWEEN THE PRODUCTION OF TWO CONSECUTIVE NEW ROLL TIMING PULSES FOR ENERGIZING THE CLUTCH AND DEENERGIZING THE BRAKE, AND MEANS RESPONSIVE TO AT LEAST PORTIONS OF TWO CONSECUTIVE NEW ROLL TIMING PULSES OCCURRING DURING THE TIME INTERVAL BETWEEN THE PRODUCTION OF TWO CONSECUTIVE RUNNING WEB TIMING PULSES FOR ENERGIZING THE BRAKE AND DEENERGIZING THE CLUTCH. 